zero = int(False)
one = int(True)
forty_three = int(''.join([str(one), str(zero), str(one), str(zero), str(one), str(one)]), one << one)
N = int(input())
if N == one:
	exit(print("NO"))
for i in range(one << one, N):
	if N % i == zero:
		exit(print("NO"))
print("YES")